Parse Cloud Module for managing Facebook Login server side using Express.
To log in, visit https://YOUR_SUBDOMAIN.parseapp.com/login.
Move main.js and app.js into your cloud/ folder in Cloud Code if it's a new project. If you're already using Express, update your app.js accordingly.
If you already have a Parse Hosting app set up, but you're not using Express yet, add the following to your `main.js: